OBD-II code · Powertrain (generic, extended)
P2454 Diesel Particulate Filter Pressure Sensor Circuit Low
Voltage on the DPF differential-pressure sensor signal line is below the lower threshold. Typically a short to ground or an open in the supply line.
Is it safe to drive with P2454?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- PossibleReference voltage line open
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Dpf Differential Pressure Sensor, Dpf Pressure Sensor Wiring
Related codes
- P2452Diesel Particulate Filter Pressure Sensor Circuit
- P2451EVAP System Switching Valve Stuck Closed
- P2453Diesel Particulate Filter Pressure Sensor Circuit Range/Performance
- P2455Diesel Particulate Filter Pressure Sensor Circuit High
- P2456DPF Differential Pressure Sensor Circuit Intermittent
- P2457EGR Cooler Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.